After reading tons of non-contest related email on FCC RFI and vanity action,
it is refreshing to spot few rare DX announcement for this week's CQ WW RTTY!
I am looking forward to 3rd HAL plaque for EU winer and also seeing type of
some oldtimers like VK6HD, ZL1AMO, HP1AC, W3LPL, PY0FF etc. I hoe fierce
competition from hot spots like EA8, CT3, PJ9 will appear again this year.
So let us have fun in digital mode, assisted or not :-)
73 de Mario, S56A, N1YU.
>From apmeyer@ix.netcom.com (ALEX A.P. MEYER) Tue Sep 24 05:30:41 1996
From: apmeyer@ix.netcom.com (ALEX A.P. MEYER) (ALEX A.P. MEYER)
Subject: LOGPLUS QUESTION.
Message-ID: <199609240430.VAA19296@dfw-ix4.ix.netcom.com>
WHAT IS THE COMMAND TO PRINTOUT OR SHOW ON THE SCREEN A----NEED LIST---
THANKS. 73 ES DX..........ALEX.......WB6AFJ......
>From apmeyer@ix.netcom.com (ALEX A.P. MEYER) Tue Sep 24 05:34:17 1996
From: apmeyer@ix.netcom.com (ALEX A.P. MEYER) (ALEX A.P. MEYER)
Subject: LOGPLUS QUESTION.
Message-ID: <199609240434.VAA23649@dfw-ix1.ix.netcom.com>
Using logplus v3.1.
What is the command to printout or show on the screen a----
--NEED LIST-----
Thanks in advance.
"73 es DX..............ALEX..............WB6AFJ...............
>From steve@g4uol.demon.co.uk (Steve Muster) Sun Sep 22 20:05:07 1996
From: steve@g4uol.demon.co.uk (Steve Muster) (Steve Muster)
Subject: Hi All
Message-ID: <haxggFAj3YRyEwcL@g4uol.demon.co.uk>
>Hi all!
>Does anybody know post or e-mail ADR for LZ-Contest-96 logs ?
>Please, send on my e-mail.
>
>EGOR
>UT5UCY
>egor@ham.carrier.kiev.ua
I have the address as BFRA, PO Box 830, 1000 Sofia, Bulgaria. I don't
think has changed since last year.
--
73 Steve Muster g4uol/gd4uol
Welcome to the Home Page of GD4UOL http://www.g4uol.demon.co.uk
Please visit my new web site and let me know how to improve it !
--
73 Steve Muster g4uol/gd4uol
Welcome to the Home Page of GD4UOL http://www.g4uol.demon.co.uk
Please visit my new web site and let me know how to improve it !
>From wrt@eskimo.com (Bill Turner) Tue Sep 24 12:39:46 1996
From: wrt@eskimo.com (Bill Turner) (Bill Turner)
Subject: FCC
References: <Chameleon.4.01.2.960923221549.JHUMET@Joe.mhv.net>
Message-ID: <3247c84a.20079906@mail.eskimo.com>
On Mon, 23 Sep 96 22:13:44 PDT, you wrote:
>Does anyone know the web address for checking on callsigns being issued at
>the FCC..
> Tnx ....Joe WA2UKP (4 now)..
>-------------------------------------
Try:
http://www.webbuild.com/~ki4hn/vanitytd.htm
73, Bill W7LZP
wrt@eskimo.com
>From trey@cisco.com (Trey Garlough) Tue Sep 24 08:32:32 1996
From: trey@cisco.com (Trey Garlough) (Trey Garlough)
Subject: Attention: Please work me in the next contest
Message-ID: <199609240732.JAA01495@trey-sun.cisco.com>
> I always thought that prohibited non-radio solicitation *during* the
> contest. Solicitation *before* the contest has certainly been around, and
> popular (though not necessarily on the Internet) for a long time, and I
> don't remember any past ethical concerns about it.
>
> That said, posting such things on *this* reflector does seem a waste of
> bandwidth. It would seem appropriate for the DX reflector, for the benefit
> of those who might need J7..
The best form of solicitation for contest QSOs is CQing during a contest.
Personal experience has shown this is far more successful than
1) announcements to the CQ-Contest mailing list
2) Web pages
3) press releases
And as further proof, K1AR has *never* made such a solicitation to the
CQ-Contest mailing list, and yet he is very successful in contests. I
wonder how he manages this?
Please folks, don't post a message saying "I will be on during the next
conest. Work me." If I hear you in the next contest, I will try to work
you, even if you don't post an annoucement to CQ-Contest. Really, I
promise.
--Trey, WN4KKN
PS: Please work me in the next contest, even though I don't know what
my callsign is going to be!
>From tree@lady.axian.com (Larry Tyree) Tue Sep 24 12:58:42 1996
From: tree@lady.axian.com (Larry Tyree) (Larry Tyree)
Subject: We have a winner!!
Message-ID: <199609241158.EAA14405@lady.axian.com>
What a pileup!! But it appears our good friend NV6O won the pileup
and is now K6GV. He was the 27th call issued on Monday at the FCC.
The file is available at ftp.fcc.gov/pub/XFS_AlphaTest/amateur.
Download mon.zip. Tomorrow, download tue.zip. They get updated
around 3 AM EDT.
Congrats to K6GV - the ham previously known as N4BO.
Tree N?TR
>From kr4uj@mindspring.com (Paul Pescitelli) Tue Sep 24 17:39:02 1996
From: kr4uj@mindspring.com (Paul Pescitelli) (Paul Pescitelli)
Subject: We have a winner!!
Message-ID: <199609241235.IAA14503@mailmule0.mindspring.com>
DONT THINK SO... check the date that it was issued... it was issued before
the 23rd. So it could not be the start of gate 2... Going to be 2-3 weeks
before they start...
At 04:58 AM 9/24/96 -0700, you wrote:
>
>What a pileup!! But it appears our good friend NV6O won the pileup
>and is now K6GV. He was the 27th call issued on Monday at the FCC.
>
>The file is available at ftp.fcc.gov/pub/XFS_AlphaTest/amateur.
>
>Download mon.zip. Tomorrow, download tue.zip. They get updated
>around 3 AM EDT.
>
>Congrats to K6GV - the ham previously known as N4BO.
>
>Tree N?TR
>
>From n4zr@contesting.com (Pete Smith) Tue Sep 24 13:34:57 1996
From: n4zr@contesting.com (Pete Smith) (Pete Smith)
Subject: Ferrite question
Message-ID: <199609241234.FAA10358@dfw-ix2.ix.netcom.com>
At 01:39 AM 9/24/96 GMT, George Cutsogeorge wrote:
>The split cores to order from Amidon are:
> 2x-43-251 for 1/4 inch cables and
> 2x-43-141 for 1/2 inch cables.
>
>You can also use non split cores as they are cheaper:
> FB-43-5621 for 1/4 inch cables and
> FB-43-1020 for 1/2 inch cables.
>
>There are also toroidal cores made of 43 material, preferred for HF, which can
>be used for winding several turns of control cables on. The inserted
impedance
>goes up by the square of the number of turns, so you can see the advantage.
>
>BTW, Amadon is a distributer. The cores are manufactured by Fair-Rite
Products
>Corp and are available through industrial suppliers. They also supply kits of
>various types of their EMI suppression products.
>
>Happy hunting,
>
>George
>
For what it's worth, here's what Amidon's literature says about core material -
43 - "Widely used for medium frequency medium frequency inductors and
wideband transformers up to 50 MHz. Very good frequency attenuation from 30
MHz to 400 MHz. toroids and ferrite beads."
73 - "Primarily a ferrite bead material. Very good attenuation properties
from 0.5 MHz through 50 MHz. Available in ferrite bead form only."
And under Ferrite cores for RFI suppression ... "The 43 material is a good
all-around material for most RFI pronblems. However, the lower frequencies
from .5 to 10 MHz can best be served with the "J" or 75 material. The 77
material can provide excellent attenuation of RFI caused by amateur radio
frequencies from 2 to 30 MHz and the 43 material is best for everything
above 30 MHz. However, it is still very effective across the entire amateur
band but not quite as good as the 77 material. The 73 material is
specifically a small ferrite bead material having a permeability of 2500
and can provide RF attenuation very similar to the 77 ferrite core material."
I just built 6 bead baluns using the 73 beads with .2 inch ID - at $4.50 a
dozen or 15 cents apiece in 300 quantity the price was sure right. Amidon
also sells split beads in the 43 material with .250 and .500 ID that show
decent impedance at 10 MHz though they clearly peak higher.
Finally, there's a chart in their literature that shows the impedance for a
reference bead. The peak for 75 is about 8 MHz, for 73 material about 25
MHz and for 43 material around 200 MHz. More important for an 80-meter
application, the 4 MHz values are:
#75 - 27 ohms; #73 17 ohms; amd #43 just under 10 ohms.
And of course, just to confuse things, not all of the relevant pieces are
available in all materials (at least from Amidon). The .2 id beads
(FB-X-2401, where "X" is the material number) are only available in 43 and
73, while the larger and more expensive ones are only available in 43, and
so are the various split cores.
Hope this is helpful.
73, Pete Smith N4ZR
n4zr@contesting.com
... and not changing!
>From dave@egh.com (David Clemons) Tue Sep 24 13:44:25 1996
From: dave@egh.com (David Clemons) (David Clemons)
Subject: NV60 => K6GV
Message-ID: <Pine.LNX.3.91.960924083924.12831A-100000@newman.egh.com>
Hi,
The replacement of NV6O with K6GV comes as sad news to me. I
guess times inevitably must change, but I will always remember the good
old days when I could count on his double qso points in every domestic
contest, working him both as NV6O and N4BO.....
73, Dave Clemons K1VUT
>From km9p@contesting.com (Bill Fisher KM9P) Tue Sep 24 15:19:27 1996
From: km9p@contesting.com (Bill Fisher KM9P) (Bill Fisher KM9P)
Subject: Wire 4-square summary - Radial length
Message-ID: <Pine.BSI.3.95.960924101810.5793A-100000@paris.akorn.net>
On Tue, 24 Sep 1996, Kris Mraz, N5KM wrote:
> There is an article coming out in the next issue (I believe) of Communications
> Quarterly by Dick Weber, K5IU, where he explains why quarter wave elevated
> radials (counterpoises) is the worse length you can use. 1/8th to 1/12th wave
> shortened radials with a common loading coil is preferred to achieve
> balanced radial currents. He bases his work on Moxon.
That's interesting. Everyone I know using 1/4 wave elevated radials is
doing so with a great amount of success.
73
>From HWDX09A@prodigy.com ( ROBERT REED) Tue Sep 24 16:10:13 1996
From: HWDX09A@prodigy.com ( ROBERT REED) ( ROBERT REED)
Subject: We have a winner!!
Message-ID: <199609241410.KAA11566@mime4.prodigy.com>
Once you spot these callsigns as Vanity issues please check who they
are issued to not only the person, but for what club he is trustee
for. I saw 9 1X2 issues for the last day but they were for club
stations such as W2PV was issued to the YCCC.
____
73, Bob Reed, WB2DIN
1991 Route 37 West - Lot 109
Toms River, New Jersey 08757
Internet : hwdx09a@prodigy.com
wb2din@juno.com
Packet : wb2din@wt3v.nj
>From aa8u@voyager.net (AA8U) Tue Sep 24 15:39:30 1996
From: aa8u@voyager.net (AA8U) (AA8U)
Subject: CONTEST related post!
Message-ID: <199609241439.KAA04021@vixa.voyager.net>
Hello Fellow Contesters,
It has been a long time since I operated the CQWW DX SSB contest "single
operator all band". In fact I can't remember just when I did it, likely late
seventies. A long time ago when staying up all night for two days was
relatively easy.
This year, I intend to enter the fray SOA to see how well I can do. Past
entries from AA8U were always multi-op or single-band efforts on 10 or 160
(where lots of rest was possible).
I post this here to seek the conventional wisdom of all the crack operators
that usually enter CQWW SSB single operator, un-assisted. Specifically, if
you take off time to rest, what times do you take off, if any? Also, with
what success has your strategy worked for you. I would be interested in
seeing your comments as to what works and what does not work.
I reviewed the past couple of CQWW SSB rate sheets and I found a lull in
productivity in the wee hours before sunrise here, only about four hours
total for the whole contest. At fifty years of age, I am not certain if this
will be enough. Will it be too much, dunno. During these "slow" times, I
noticed some very good mults showed up on the low bands and I would not want
to miss them. The strongest bands at this station are the low bands,
especially 80 and 160.....
Any advice?
Thanks in advance for your comments.
73,
Bruce
aa8u@voyager.net
>From bills@halsey.com (Bill Sattler) Tue Sep 24 15:44:00 1996
From: bills@halsey.com (Bill Sattler) (Bill Sattler)
Subject: Ferrite question
Message-ID: <m0v5YjC-002qKoC@halsey.com>
Pete, just wanted to let you know I once built a run of baluns out of 73
material because the specs looked better. They all overheated and melted
the baluns. I now use the 43 material which works well at HF and does not
overheat. I'd encourage you to check your baluns with high power for some
time before putting them up in inacessible places.
73
Bill
N0XX
bills@halsey.com
DX Engineering
>For what it's worth, here's what Amidon's literature says about core
material -
>43 - "Widely used for medium frequency medium frequency inductors and
>wideband transformers up to 50 MHz. Very good frequency attenuation from 30
>MHz to 400 MHz. toroids and ferrite beads."
>
>73 - "Primarily a ferrite bead material. Very good attenuation properties
>from 0.5 MHz through 50 MHz. Available in ferrite bead form only."
>
>And under Ferrite cores for RFI suppression ... "The 43 material is a good
>all-around material for most RFI pronblems. However, the lower frequencies
>from .5 to 10 MHz can best be served with the "J" or 75 material. The 77
>material can provide excellent attenuation of RFI caused by amateur radio
>frequencies from 2 to 30 MHz and the 43 material is best for everything
>above 30 MHz. However, it is still very effective across the entire amateur
>band but not quite as good as the 77 material. The 73 material is
>specifically a small ferrite bead material having a permeability of 2500
>and can provide RF attenuation very similar to the 77 ferrite core material."
>
>I just built 6 bead baluns using the 73 beads with .2 inch ID - at $4.50 a
>dozen or 15 cents apiece in 300 quantity the price was sure right. Amidon
>also sells split beads in the 43 material with .250 and .500 ID that show
>decent impedance at 10 MHz though they clearly peak higher.
>
>Finally, there's a chart in their literature that shows the impedance for a
>reference bead. The peak for 75 is about 8 MHz, for 73 material about 25
>MHz and for 43 material around 200 MHz. More important for an 80-meter
>application, the 4 MHz values are:
>#75 - 27 ohms; #73 17 ohms; amd #43 just under 10 ohms.
>
>And of course, just to confuse things, not all of the relevant pieces are
>available in all materials (at least from Amidon). The .2 id beads
>(FB-X-2401, where "X" is the material number) are only available in 43 and
>73, while the larger and more expensive ones are only available in 43, and
>so are the various split cores.
>
>Hope this is helpful.
>
>
>73, Pete Smith N4ZR
>n4zr@contesting.com
>... and not changing!
>
>
>From km9p@contesting.com (Bill Fisher KM9P) Tue Sep 24 16:05:46 1996
From: km9p@contesting.com (Bill Fisher KM9P) (Bill Fisher KM9P)
Subject: CONTEST related post!
Message-ID: <Pine.BSI.3.95.960924110411.6580A-100000@paris.akorn.net>
On Tue, 24 Sep 1996, AA8U wrote:
> you take off time to rest, what times do you take off,
You can't sleep the first night if you expect to make the top 10. Sleep 3
hours the 2nd night.
> what success has your strategy worked for you. I would be interested in
> seeing your comments as to what works and what does not work.
Stay with it. Dont quit.
Remember this is a 48 hour contest, not a Sprint.
73
>From WX0B-JTERLESKI@postoffice.worldnet.att.net (Jay Terleski) Tue Sep 24
>16:03:08 1996
From: WX0B-JTERLESKI@postoffice.worldnet.att.net (Jay Terleski) (Jay Terleski)
Subject: Ferrite beads, torroids used for rfi suppression and Baluns, etc.
References: <199609241234.FAA10358@dfw-ix2.ix.netcom.com>
Message-ID: <3247F82C.40A5@postoffice.worldnet.att.net>
I am hopefully adding to this conversation and don't wish to offend any of the
contributors. But my last few years of building Lots and Lots of transmission
line
transformers (Baluns ans UN-uns) as well as lots of research on what materials
and why
work and why they dont. Plus many conversations with Dr. Sevick W2FMI, who
I've had
the great honor of hosting him and his beautiful XYL.
I took my BSEE and a minor in Physics of materials in 1973.
That said, I would like to say that their are some misconceptions of what
material to
really use for Baluns and RFI applications. Including misunderstandings by the
manufacturers of the so called current beaded baluns. Due to the wrong
assumption
that their is flux saturation in transmission line transformers.
1:1 Baluns and 4:1 Baluns:
I recommend anyone who is going to use the "current type" beaded balun read the
history of baluns in Dr. Sevicks book "Transmission Line Transformers" The new
one
published by CQ. The material is the same in the editions published by the
ARRL but
not as clear. In this discussion Dr. Sevick tells the history of work done on
ferrites and the development of transmission line transformers and the history
of the
Balun using ferrite and air cores.
He also points out the "bad press" that ferrite cores got due to an incomplete
and
erroneous experiment done on baluns.
To Summerize for those who want the bottom line.
The Reisert balun is one of the best you will ever find for HF.
Beaded Baluns are not the best and can lead to failure at high power.
The beaded balun must use high permeability beads, much higher than the Reisert
type
balun to achieve the choking neccessary in such a short linear distance. So if
you
use these types of baluns they will work but they are not as efficient. They
will
lose power to heat in the first beads and they can become very hot. I have
demonstrated this with a famous manufacturers beaded balun where it actually
got so
hot it caught on fire and failed at amateur power levels of 1.5kw.
The Riesert Balun type uses a 125u- 250u permeability material. It uses the
same
teflon coax wrapped around a torroidal core. 10-14 wraps can easily be done if
you
remove the outside insulation and keep the wraps seperated from each other by
wrapping
with flexible electrical tape if you wish. You can do a crossover wrap as well
as
shown in the book. This type of balun transformer is a true transmission line
just
like the beaded balun. BUT it also gains a much higher choking action from the
transformation of the N turns power. It has dramatically more isolation
capability
and it has much higher efficiency of power transfere. It will not heat up like
the
beaded type balun until you exceed the coaxial IR current limits. Say 10KW.
The heat at that level will be due to IR loss NOT Flux losses in the ferrite.
RFI suppression.
Higher permeabilities of beads and torroids work fine at HF. Here you are not
worried
about efficiency of power transfere of your transformer. The 125u torroids
will still
work but a better choice if you cannot wrap turns around the core is to use the
2500 u
beads. Then you do not need wraps for most purposes.
There is alot more to the use and misuse of ferrites, and much more work needs
to be
done in this area. Power splitters, High power, matching devices are all
possible
using these low permeability cores and the high efficiencies they are cabable
of lend
themselves to be a usefull tool to our hobby. But all tools have their proper
use.
Working on my 1/2 Four Square.
BTW K5IU has an excellent article comming in Communications Quarterly which
proves
that 1/4 wave radials are absolutely the WRONG length for any vertical antenna.
He proved it to me on my raised radials. I won't steal his thunder but before
you go
to all the trouble of measureing and cutting matched dipoles for radials get
ahold of
Dick. Or G6XN's book and make them 45-60 degrees long fed with a common coil
at the
feed point.
See you in the upcomming pileups
Jay WX0B
>From jon@vii.com (Jon) Fri Sep 6 22:28:21 1996
From: jon@vii.com (Jon) (Jon)
Subject: We have a winner!!
Message-ID: <199609241527.JAA19618@lonepeak.vii.com>
Was this call change submitted under Gate 2? Do we really know?
----------
> From: Larry Tyree <tree@lady.axian.com>
> To: cq-contest@TGV.COM
> Subject: We have a winner!!
>
>
> What a pileup!! But it appears our good friend NV6O won the pileup
> and is now K6GV. He was the 27th call issued on Monday at the FCC.
>
> The file is available at ftp.fcc.gov/pub/XFS_AlphaTest/amateur.
>
> Download mon.zip. Tomorrow, download tue.zip. They get updated
> around 3 AM EDT.
>
> Congrats to K6GV - the ham previously known as N4BO.
>
> Tree N?TR
>From pa3dmh@igr.nl (Alex van Hengel) Wed Sep 25 01:34:07 1996
From: pa3dmh@igr.nl (Alex van Hengel) (Alex van Hengel)
Subject: J7 in CQ WW RTTY - isnt there a rule?
Message-ID: <32487DFF.1975@igr.nl>
Steven Nace wrote:
>
> >The PA team currently active as J79BP,RC,QA,WP from Dominica in the
> >carribean asked me to bring the following to your attention:
> >
> >- The team will be a Multi-Single entry in the CQ WW RTTY Contest.
> > The callsign used during this activity will be J77C.
>
> etc etc etc.
>
> Question:
>
> Isnt there a rule that prohibits soliciting QSOs for a contest?
>
> Please tell me we are not going to have to read hundreds of these
> advertisements this fall. PLEASE!
>
> de KN5H not KN5S
>
> PS> Prior to the SAC contest, I read at least 4 ads for 'please work me in
> the contest.' Those guys didnt get a Q from me. Neither will this group.
>
Or my English is bad, or people read things which are not there.
But after carefully reading my initial mail to the reflector I can not
find any indication which is related to "soliciting QSOs". So I do not
understand the "dust" caused by my earlier message.
Every DX and/or Contest newsletter you will read during the contest
season is a listing of upcoming contest activities. Even XZ1N announced
they will be in the CQ WW CW Contest.
In contrary to the average mail I receive daily from the reflector on
subjects like Vanity calls etc. I feel my message had the correct content
and was posted at the correct reflector.
73' ALex PA3DMH
--
/////\\
( # # )
-----oOO-(_)-OOo-----------------------------------------------------
Alex van Hengel, PA3DMH
Secretary Contestgroup Oude Maas PI4COM/PA6WPX
Homepage PI4COM : http://www.euronet.nl/users/norf/pi4com.html
1996 Carib Tour : http://www.igr.nl/~pa3dmh/tour1996
Internet e-mail : pa3dmh@igr.nl
---------------------------------------------------------------------
>From jon@vii.com (Jon) Fri Sep 6 22:45:10 1996
From: jon@vii.com (Jon) (Jon)
Subject: Calls issued
Message-ID: <199609241544.JAA20454@lonepeak.vii.com>
I wonder how these guys are related?????
Issued Monday......
AZ KC7SSC JENSEN, ANDREW M (New Licensee)
AZ KC7SSD JENSEN, ANDREW M (New Licensee)
AZ KC7SSE JENSEN, ANDREW M (New Licensee)
>From k9bg@mc.net (Jerry Brunning) Wed Sep 25 00:08:38 1996
From: k9bg@mc.net (Jerry Brunning) (Jerry Brunning)
Subject: Enough with the Vanity Calls
References: <199609240155.VAA13864@onlink1.onlink.net>
Message-ID: <324869F6.6F9C@mc.net>
ken smith wrote:
>
> I think that the rest of the world has had enough of the Vanity Call
> issue.There must be somewhere the discussion can be taken other than a
> "Contest Forum". Any relationship between Vanity Calls and Contesting is
> purely imaginary.
>
> Give it a rest!
>
> Ken Smith
> VA3SK
Ken,
Do you happen to know when the next FCC gate opens? I'd like to get an
early start on that thread. Thanks! =:>O
Jerry, K9BG
>From fisher@hp-and2.an.hp.com (Tony Brock-Fisher) Tue Sep 24 17:11:59 1996
From: fisher@hp-and2.an.hp.com (Tony Brock-Fisher) (Tony Brock-Fisher)
Subject: CATV Hardline Vf
Message-ID: <9609241611.AA13029@hp-and2.an.hp.com>
Anybody know the velocity factor for CATV Hardline? I just
picked up a nice hunk of 7/8" diameter, foam dielectric with
black poly jacket...
-Tony, K1KP, fisher@hp-and2.an.hp.com
>From fisher@hp-and2.an.hp.com (Tony Brock-Fisher) Tue Sep 24 17:16:16 1996
From: fisher@hp-and2.an.hp.com (Tony Brock-Fisher) (Tony Brock-Fisher)
Subject: CONTEST related post!
Message-ID: <9609241616.AA13091@hp-and2.an.hp.com>
In response to AA8U's question about sleeping in CQWW Single-op:
1. If you must sleep both nights, don't sleep at the same. This
guarantees you at least one shot at all possible propagation paths.
2. I've found a 90 minute nap works wonders, usually timed after
European sunrise, before 20 opens, on Sunday night. That's relative
to 1-land propagation...
-Tony, K1KP, fisher@hp-and2.an.hp.com
>From kr2j@ix.netcom.com (Robert E. Naumann) Tue Sep 24 17:42:47 1996
From: kr2j@ix.netcom.com (Robert E. Naumann) (Robert E. Naumann)
Subject: Wire 4-square summary - Radial length
Message-ID: <01BBAA0D.A2136F20@dfw-tx20-07.ix.netcom.com>
Re: K5IU's article
I was at the NTCC meeting where K5IU made a presentation based on his
article. It really is interesting.
The following is not to be construed as an official interpretation of his
presentation, but rather what my non-engineering mind took from it.
The theory is basically that with 1/4 wave elements and radials, the
impedance of the radials is very low. Of course, this is what you want -
in theory. In practice, because of various things - surrounding objects,
ground conductivity below the radial, the impedance can vary quite a bit.
The result is that the current flowing in the radial system will vary
right along with it.
If the impedance of one radial is say, 10 ohms, and another 50 ohms, (1:5)
you'll get uneven distribution of current. Dick's theory is to raise the
impedance up to a few hundred ohms, thereby making the relatively small
changes in impedance introduced by those outside influences be less
significant.
In the example that I used, let's say we start with an impedance of 250
ohms instead of the 10 ohm radial and a 300 ohm radial instead of the 50.
The impedance ratio would be pretty close in this case (5:6).
He actually measured radial currents at his and WX0B's qth's as part of his
research. Interestingly enough, he found that several radials had no
current flowing in them at all! He has not done a whole lot of on-the-air
testing of performance difference, but it sounds like it may be worth
pursuing.
That's the "laymen's" version.
KR2J/5
>From kurscj@oampc12.csg.mot.com (Chad Kurszewski WE9V) Tue Sep 24 18:18:45
>1996
From: kurscj@oampc12.csg.mot.com (Chad Kurszewski WE9V) (Chad Kurszewski WE9V)
Subject: Calls issued
Message-ID: <2.2.32.19960924171845.00685338@oampc12.csg.mot.com>
At 03:45 PM 9/6/96 -0600, Jon wrote:
>I wonder how these guys are related?????
>Issued Monday......
>AZ KC7SSC JENSEN, ANDREW M (New Licensee)
>AZ KC7SSD JENSEN, ANDREW M (New Licensee)
>AZ KC7SSE JENSEN, ANDREW M (New Licensee)
Maybe the same as this "club": (notice same calls as above)
KC7SRX JACKS PEAK ARA DARK CANYON N5IA
KC7SRY JACKS PEAK ARA GUTHRIE PEAK N5IA
KC7SRZ JACKS PEAK ARA JAL N5IA
KC7SSA JACKS PEAK ARA BUCK MTN N5IA
KC7SSB ZIA CONNECTION REPEATERS N5IA
KC7SSC STEEPLE ROCK AMATEUR RADIO CLUB N5IA
KC7SSD JACKS PEAK ARA SANDIA PEAK N5IA
KC7SSE JACKS PEAK ARA CABALLO MTN N5IA
KC7SSF JACKS PEAK ARA BENSON RIDGE N5IA
---
Chad Kurszewski, WE9V e-mail: Chad_Kurszewski@csg.mot.com
The Official "Sultans of Shwing" Web Site: http://www.QTH.com/sos
>From WX0B-JTERLESKI@postoffice.worldnet.att.net (Jay Terleski) Tue Sep 24
>18:35:23 1996
From: WX0B-JTERLESKI@postoffice.worldnet.att.net (Jay Terleski) (Jay Terleski)
Subject: Ferites Baluns, RFI suppression, and 4 squares
Message-ID: <32481BDB.6F8C@postoffice.worldnet.att.net>
I am hopefully adding to this conversation and don't wish to offend any of the
contributors. But my last few years of building Lots and Lots of transmission
line
transformers (Baluns ans UN-uns) as well as lots of research on what materials
and why they
work and why they dont. Plus many conversations with Dr. Sevick W2FMI, who
I've had
the great honor of hosting him and his beautiful XYL.
I took my BSEE and a minor in Physics of materials in 1973.
That said, I would like to say that their are some misconceptions of what
material to
really use for Baluns and RFI applications. Including misunderstandings by the
manufacturers of the so called current beaded baluns. Due to the wrong
assumption
that their is flux saturation in transmission line transformers using torroids.
1:1 Baluns and 4:1 Baluns:
I recommend anyone who is going to use the "current type" beaded balun read the
history of baluns in Dr. Sevicks book "Transmission Line Transformers" The new
one
published by CQ. The material is the same in the editions published by the
ARRL but
not as clear. In this discussion Dr. Sevick tells the history of work done on
ferrites and the development of transmission line transformers and the history
of the
Balun using ferrite and air cores.
He also points out the "bad press" that ferrite cores got due to an incomplete
and
erroneous experiment done on baluns.
To Summerize for those who want the bottom line.
The Reisert type balun design is one of the best you will ever find for HF.
This is a low
permeability Torroidal core with coax wrapped around it with enouph turns to be
effective
at the chosen frequencies.
Beaded Baluns are not the best and can lead to failure at high power.
The beaded balun must use high permeability beads, much higher than the Reisert
type
balun to achieve the choking neccessary in such a short linear distance. So if
you
use these types of baluns they will work but they are not as efficient. They
will
lose power to heat in the first beads and they can become very hot. I have
demonstrated this with a famous manufacturers beaded balun where it actually
got so
hot it caught on fire and failed at amateur power levels of 1.5kw.
The Riesert Balun type uses a 125u- 250u permeability material. It uses the
same
teflon coax wrapped around a torroidal core. 10-14 wraps can easily be done if
you
remove the outside insulation and keep the wraps seperated from each other by
wrapping
with flexible electrical tape if you wish. You can do a crossover wrap as well
as
shown in the book. This type of balun transformer is a true transmission line
just
like the beaded balun. BUT it also gains a much higher choking action from the
transformation of the N turns power. It has dramatically more isolation
capability
and it has much higher efficiency of power transfere. It will not heat up like
the
beaded type balun until you exceed the coaxial IR current limits. Say 10KW.
The heat at that level will be due to IR loss NOT Flux losses in the ferrite.
RFI suppression.
Higher permeabilities of beads and torroids work fine at HF. Here you are not
worried
about efficiency of power transfere of your transformer. The 125u torroids
will still
work but a better choice if you cannot wrap turns around the core is to use the
2500 u
beads. Then you do not need wraps for most purposes.
There is alot more to the use and misuse of ferrites, and much more work needs
to be
done in this area. Power splitters, High power, matching devices are all
possible
using these low permeability cores and the high efficiencies they are cabable
of lend
themselves to be a usefull tool to our hobby. But all tools have their proper
use.
Working on my 1/2 Four Square.
BTW K5IU has an excellent article comming in Communications Quarterly which
proves
that 1/4 wave radials are absolutely the WRONG length for any vertical antenna.
He proved it to me on my raised radials. I won't steal his thunder but before
you go
to all the trouble of measureing and cutting matched dipoles for radials get
ahold of
Dick. Or G6XN's book and make them 45-60 degrees long fed with a common coil
at the
feed point.
See you in the upcomming pileups
Jay WX0B
>From k5na@bga.com (Richard L. King) Tue Sep 24 18:46:21 1996
From: k5na@bga.com (Richard L. King) (Richard L. King)
Subject: Calls issued
Message-ID: <199609241746.MAA14819@zoom.bga.com>
>I wonder how these guys are related?????
>
>Issued Monday......
>
>AZ KC7SSC JENSEN, ANDREW M (New Licensee)
>AZ KC7SSD JENSEN, ANDREW M (New Licensee)
>AZ KC7SSE JENSEN, ANDREW M (New Licensee)
You missed some of them:
>AZ KC7SRX JENSEN, ANDREW M (Club)
>AZ KC7SRY JENSEN, ANDREW M (Club)
>AZ KC7SRZ JENSEN, ANDREW M (Club)
>AZ KC7SSA JENSEN, ANDREW M (Club)
>AZ KC7SSB JENSEN, ANDREW M (Club)
>AZ KC7SSF JENSEN, ANDREW M (Club)
and before Monday:
>AZ WB5QHS JENSEN, ANDREW M (Club)
>AZ N5IA JENSEN, ANDREW M (Primary)
Anyone have a clue why all these club calls are being issued to one person?
73, Richard
K5NA@BGA.COM
http://www.realtime.net/~k5na
>From donovanf@sgate.com (Frank Donovan) Tue Sep 24 18:31:33 1996
From: donovanf@sgate.com (Frank Donovan) (Frank Donovan)
Subject: Ferrite question (fwd)
Message-ID: <Pine.OSF.3.95.960924133018.8450E-100000@jekyll.sgate.com>
FYI, Amidon has an WWW page as well as an e-mail address:
sold@earthlink.com
73
Frank
W3LPL
donovanf@sgate.com
>From n3buo@ix.netcom.com (Dave Greig) Tue Sep 24 19:05:30 1996
From: n3buo@ix.netcom.com (Dave Greig) (Dave Greig)
Subject: Calls issued
Message-ID: <199609241804.LAA23818@dfw-ix8.ix.netcom.com>
This is one of the biggest problem facing our Hobby. This is a great
example of abuse of the system.
----------
> From: Richard L. King <k5na@bga.com>
> To: cq-contest@TGV.COM
> Subject: Re: Calls issued
>
> >I wonder how these guys are related?????
> >
> >Issued Monday......
> >
> >AZ KC7SSC JENSEN, ANDREW M (New Licensee)
> >AZ KC7SSD JENSEN, ANDREW M (New Licensee)
> >AZ KC7SSE JENSEN, ANDREW M (New Licensee)
>
> You missed some of them:
>
> >AZ KC7SRX JENSEN, ANDREW M (Club)
> >AZ KC7SRY JENSEN, ANDREW M (Club)
> >AZ KC7SRZ JENSEN, ANDREW M (Club)
> >AZ KC7SSA JENSEN, ANDREW M (Club)
> >AZ KC7SSB JENSEN, ANDREW M (Club)
> >AZ KC7SSF JENSEN, ANDREW M (Club)
>
> and before Monday:
>
> >AZ WB5QHS JENSEN, ANDREW M (Club)
> >AZ N5IA JENSEN, ANDREW M (Primary)
>
> Anyone have a clue why all these club calls are being issued to one
person?
>
> 73, Richard
> K5NA@BGA.COM
> http://www.realtime.net/~k5na
>
>From snace@tdrss.wsc.nasa.gov (Steven Nace) Tue Sep 24 20:38:40 1996
From: snace@tdrss.wsc.nasa.gov (Steven Nace) (Steven Nace)
Subject: KC7 club calls issued
Message-ID: <v02120d01ae6de714955a@[192.77.86.212]>
>At 03:45 PM 9/6/96 -0600, Jon wrote:
>>I wonder how these guys are related?????
>>Issued Monday......
>>AZ KC7SSC JENSEN, ANDREW M (New Licensee)
>Maybe the same as this "club": (notice same calls as above)
>
>KC7SRX JACKS PEAK ARA DARK CANYON N5IA
etc. etc.
Here in southern New Mexcio there exists the Zia Net, a network of 2 meter
machines that provide repeater-like coverage from El Paso to Albuquerque to
Phoenix. N5IA is the trustee. It looks like he may wish to replace the N5IA
ID heard throughout the network with separate, unique calls. Dont think
N5IA will gobble up any fancy calls with these clubs.
de KN5H
____________________________________________________________________
| Steven K. Nace KN5H Phone: 505-525-6205 |
| AlliedSignal Technical Svcs E-Mail: Snace@tdrss.wsc.nasa.gov |
| Spacecraft Engineering Group Alt E-mail:steven@zianet.com |
| NASA White Sands Complex Fax: 505-525-6229 |
| Las Cruces, NM 88004 Alt Fax: 505-527-7223 |
+____________________________________________________________________+
>From 71111.260@CompuServe.COM (Hans Brakob) Tue Sep 24 19:41:43 1996
From: 71111.260@CompuServe.COM (Hans Brakob) (Hans Brakob)
Subject: Calls Assigned
Message-ID: <960924184143_71111.260_EHM89-1@CompuServe.COM>
Somebody asked:
>I wonder how these guys are related?????
>Issued Monday......
>AZ KC7SSC JENSEN, ANDREW M (New Licensee)
>AZ KC7SSD JENSEN, ANDREW M (New Licensee)
>AZ KC7SSE JENSEN, ANDREW M (New Licensee)
Actually, NINE new calls were issued to that guy (N5IA) on Monday.
KC7SRX, SRY, SRZ, SSA, SSB, SSC, SSD, SSE, SSF.
All are "clubs" on different mountain tops. Looks like the guy
is working the system to put different calls on a bunch of
networked repeaters.
73, de Hans, K0HB
>From edwoods@pbsac01.isp.PacBell.COM (edwoods) Tue Sep 24 19:19:00 1996
From: edwoods@pbsac01.isp.PacBell.COM (edwoods) (edwoods)
Subject: The demise of N4BO
Message-ID: <9609241852.AA13330@gw3.pacbell.com>
The dits go this way and that.
That's life - it's a matter of fact.
Even when I send real slow,
some still copy N4BO
My SprINT scores are all rearranged
Tree said, "I think its time for a change"
A call from my youth, you see
It's Easter for K6GV.
So goes the callsign insanity
Still not sure about vanity
But see you on the low end of the band
with code that you'all can stand.
Ummmmmm. This was kinda a hard decision. I've had a great time with the
after-shocks caused by the misinterpretation of NV6O - at any speed.
K6GV was a secondary call I got in the last call sign change go-around in
1976. It was obtained because I had moved from my parent's place in the Bay
Area to the Sacramento area. My primary call at the time was WB6SRA.
I got involved in fast cars and fast wom errrrrrrrrrrrrrrrr.... other
things. Renewed a couple of months late in 1980 and lost both calls. No
grace period at the time. I picked up NV6O in 1983 and dubbed it "my Navy
MARS call"..
I will miss being called N4BO in SSB sweepstakes.
Oh yeah. This was a very late Gate I submission.
Thanks all who put up with me and my evil twin for 13 years.
Bob, N4BP, now has the floor.
Eric, K6GV
edwoods@pacbell.com (next thing to change)
>From edwoods@pbsac01.isp.PacBell.COM (edwoods) Tue Sep 24 19:44:00 1996
From: edwoods@pbsac01.isp.PacBell.COM (edwoods) (edwoods)
Subject: Old F.A.R.T.S and NV6O
Message-ID: <9609241854.AA13904@gw3.pacbell.com>
Four of us in the Folsom area are thinking about forming a club, The Old
Folsom Amateur Radio Transmitting Society and eventually obtaining NV6O as a
call.
It will be interesting to see if it's available in two years.
When the sunspots return, it would be good to have for WPX.
Eric, K6GV
edwoods@pacbell.com(looking)
|